Robert stewart



(No Model.)

R. STEWART.

BOILER COVERING. No. 349,183,. Patented Sept. 14, 1886.

N. PETERS. Phola-Uthagmphan Washmglum u. c.

UNITED STATES PATENT OFFICE.

ROBERT STEVART, OF LONDON, COUNTY OF MIDDLESEX, ENGLAND.

BOILER-COVERING.

SPECIFICATION forming part of Letters Patent No. 349,183, datedSeptembez 14, 1886.

Application filed April 21, 1886. Serial No. 100,258. (No model.)

To (LZZ whom it may concern:

Be it known that I, ROBERT STEWART, manufacturer, a subject of the Queenof Great Britain, residing at London, in the county of Middlcscx,England, have invented a certain new and useful Improved CompoundMaterial to be used as a Boiler-Covering, or for the walls or Roofs ofBuildings, and I do hereby declare the following to be a full, clear,and exact description of the invention, reference being had to thedrawings accompanying the same.

My invention relates to an improved combination of what is known assilicate, cotton, or slag-wool with a sheet-metal plate and wire-net;and the object of my invention is to facilitate the application of thematerial as a covering for boilers or for walls or roofs by making itcomplete in itself, so that it can be quickly and easily fitted,removed, and replaced, when desired. I attain this object by the methodillustrated in the accompanying drawings, in which Figure 1 is asection, and Fig. 2 a view from inside,of the material curved to fit thesurface of a steam-boiler. Fig. 8 shows in section the compound materialapplied as a house-wall. It may also be used in roofs and other parts ofa building.

The same letters of reference indicate similar parts in the severalfigures.

In Figs. 1 and 2, a is an outside sheet, of iron or other metal, plainor galvanized. b is a sufficient thickness of silicate, cotton, orslag-wool, and c is an inner covering,.of iron or other wire-netting. dd d are bolts or studs fitted or fixed into the outside sheet of metala, and projecting through the inner wire-netting, c, the whole beingheld together by washers e and nuts or pins f. The outer metal sheet, a,is first shaped and fitted to the surface of the boiler, "as shown, andthe bolts or studs d d (1 having been then fitted in their places, I layon a sufficient thickness of the silicate, cotton, or slag-wool b,manufactured, in the usual well-known way, in thin sheet-s or plates,until the requisite uniform thickness has been obtained, and upon it Ifit and press down the sheet of open wire-netting 0 until the washers eand nuts f can be fixed upon the ends of the bolts d, so that themineral cotton or wool I), with its outer and inner metal coverings,aand c, are all held firmly and durably together.

The compound material or covering, prepared as described, can be fixedto the boiler to which it is fitted by means of studs screwed into theboiler and passing through corresponding holes in the covering, nutsbeing screwed upon the outer ends of the studs, or wooden or other ribsmay be fixed to the boiler at intervals, and the covering nailed orscrewed to these ribs; or it may be held by external bands or hoopspassing round the covering and holding it down upon the boiler, or byother equivalent means, according to the shape and position of theboiler.

If the outer metal, a, is sufficiently thin, the compound covering maybe made in fiat sheets and subsequently bent to their place.

In Fig. 3 is shown, in section, the compound material used as the Wallof a building. In this case the exterior sheet, a, is shown corrugated,instead of fiat, in order to give greater strength and rigidity, and theouter sheet, (1, the mineral, cotton, or wool b, and the inner wire net,c, are held together bydouble-ended wires 9, passed through holes in theouter sheet, a, and having their inner ends bent over upon the wirenetc. Plaster or cement may be applied upon the surface of the wire-net c,as shown in section at h, in order to give greater finish to the insideof the building.

The improved compound covering made and used in the way described andshown is complete in itself, fire-proof, very durable, a good insulatorand non-conductor of heat, easy of application, and readily removed andreplaced, while it is weather-proof, vermin-proof, and

.well adapted for roofing or covering in hot climates.

I am aware that silicate, cotton, or slag- Vhat I claim as my invention,and desire to secure by Letters Patent, is

1. The combination of silicate, cotton, or slag-wool I), held between asheet of metal, a, 5 on its outer side, and a sheet of wire-netting,

c, on its inner side, so as to form an independent compound material,substantially as set forth and shown.

2. The combination, with the silicate, cotro ton, 0r slag-wool 7, themetal sheet a, and

wire-netting 0, or two sheets of wire-netting, c, the double-ended bentwires substantially as and for the purpose set forth and shown.

In testimony whereof Ihave signed my name to this specification in thepresence of two sub- [5 scribing witnesses.

ROBERT S'lEWA'li-l. \Vitnesscs:

ARTHUR E. EDWARDS, E. M. RIDGWAY.

